There are
1,922 mi
from Killeen, TX to Klamath Falls, OR
That's the driving distance. It would take 1 day 11 hours to go from Killeen, Texas to Klamath Falls, Oregon.
The flight distance (direct flight from Killeen, TX to Klamath Falls, OR) is 1,530.28 mi.
1,922 mi = 3,092.35 kms